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參數資料
| 型號： | W89C880F |
| 英文描述： | LAN Hub Controller |
| 中文描述： | 局域網集線器控制器 |
| 文件頁數： | 39/72頁 |
| 文件大?。?/td> | 731K |
| 代理商： | W89C880F |
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W89C840F
Publication Release Date:April 1997
Revision A1
- 39 -
22:20
R
TPS
Transmit Process State.
This field indicates the transmit state. This field does not generate
interrupt.
19:17
R
RPS
Receive Process State.
This field indicates the receive state. This field does not generate
interrupt.
16
R
NIR
Normal Interrupt Report.
The normal interrupt report includes transmit completed interrupt,
transmit buffer unavailable interrupt and the receive completed
interrupt.
The NIR is a logical OR result of the bits 0, 2, 6 of the register
C14/CISR. Only the bits corresponding to the unmasked bits of
C1C/CIMR will affect this bit.
15
R
AIR
Abnormal Interrupt Report.
The abnormal interrupt includes transmit process in idle state
interrupt, receive early interrupt, receive error interrupt, transmit
FIFO under-flow interrupt, receive buffer unavailable interrupt,
receive idle state interrupt, transmit early interrupt, timer expire
interrupt and the bus error interrupt.
The AIR is a logical OR result of the bits 1, 3, 4, 5, 7, 8, 10, 11, 13
of the register C14/CISR. Only these bits corresponding to the
unmasked bits of the C1C/CIMR will affect this bit.
14
R
---
Reserved. Fixed at 0.
13
R/W
BE
Bus Error.
A high indicates a bus error happened. The error type
i s
shown by
bit 25~23.
12
R
---
Reserved. Fixed at 0.
11
R/W
TE
Timer Expired.
A high indicates the general timer (C2C/CGTR) expired.
10
R/W
TEI
Transmit Early Interrupt
The W89C840F will has Transmit Early Interrupt status set after
the packet to be transmitted is completely transferred into the
transmit FIFO if Transmit Early Interrupt On bit of C18/CNCR is
set.
The TEI
i s
cleared automatically after the packet is transmitted out
from the transmit FIFO completely.
9
R
---
Reserved. Fixed at 0.
8
R/W
RIDLE
Receive in Idle State.
Set means the receive DMA state machine is in the idle state.
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